The the best of my knowledge, the WH is a strict no fly zone. Except except during DEFCON 3 where planes are required to pass over WH and Pentagon every 2 hours.
Or.
The press conf. is not taking place in the WH
https://m.facebook.com/ABCNewsLive/videos/white-house-press-briefing-interrupted-by-sound-from-pair-of-us-military-jets/4017718844933137/?__so__=discover&__rv__=related_videos&locale=sw_KE
(post is archived)